PowerFlow Systems, Inc.

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» Which aircraft are FAA approved (STC) with the Power Flow Exhaust? » What about experimental (homebuilt/amateur) built aircraft? » If your aircraft model is not listed, and you have a Lycoming four cylinder engine » Can I get an FAA Field approval for my aircraft? » What type of performance gains can I expect? » Will I get climb or cruise performance? » Will it increase my RPM? » Will I go over RPM Redline? » Will I get Altitude or Service ceiling increases? » Will my EGT probe fit in your exhaust? » What type of fuel saving should I expect? » Does the tube have to stick out of the cowl? » Does this tube increase drag? » Which aircraft are FAA Approved (STC) with the Power Flow Exhaust? back to top Cessna 172: 172, 172A-P with Lycoming O-320 Cessna 172: 172, 172A-Q with Lycoming O-360 Cessna 175: 175, 175 A-C with Lycoming O-360 Cessna 177: 177 B with Lycoming O-360 Cessna 177: 177, 177A with Lycoming O-360 Cessna 177: 177 with Lycoming O-320 Grumman AA5: AA5, AA5-A with Lycoming O-320 (s/n above 641) Grumman AA5: AA5 with Lycoming O-320 (s/n below 641) Grumman AA5: AA5-B, AG5-B with Lycoming O-360 Mooney M20: M20 B,C,D,G with Lycoming O-360 Mooney M20: M20 E,F,J (201) with Lycoming IO-360 Piper PA28: PA28-150, 160, 180 (under s/n 1761) with Lycoming O-360 Piper PA28: PA28-150, 160 (under s/n 1761) with Lycoming O-320 Piper PA28: PA28-140 with Lycoming O-360 Piper PA28: PA28-140 with Lycoming O-320 » Experimental or Field Approval required for the following. back to top Sportsman: Sportsman 2+2 with either Lycoming O-320 or O-360 Glastar: Glastar with either Lycoming O-320 or O-360 Cessna 170: 170 with Lycoming O360 (Field approval required) » If your aircraft type is not listed and you have a Lycoming engine: back to top Our engineering and R&D resources are limited. We are developing and certifying the aircraft models that are the most popular. Currently our exhaust design has been proven on 4 cylinder, Lycoming engines. As resources permit, the smaller aircraft markets will be entered into the certification process. You can let us know that your are interested in an exhaust system for your aircraft by filling out our information request. » Can I get an FAA Field Approval for my aircraft? back to top Power Flow Systems does not do field approvals here at the facility. There are limited instances of people being able to do field approvals on their own with their mechanics. Please contact us if you have further questions. » What type of performance gains can I expect? back to top Each aircraft will experience different results in a real world application. Please go to the aircraft product page that corresponds to your aircraft to see results that are based on your aircraft test results and customer experiences. » Will I get an increase in climb or cruise performance? back to top The types and amount of improvement that you will see depend on the aircraft and the type of propeller configuration (fixed or constant). Please refer to the individual product pages for the specific ranges for each individual aircraft. Below is a general explanation between constant speed and fixed pitch improvements.

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